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<p>The Q3SqlSelectCursor class provides browsing of general SQL SELECT statements. <a href="#details">More...</a></p>
<pre> #include &lt;Q3SqlSelectCursor&gt;</pre><p><b>This class is part of the Qt 3 support library.</b> It is provided to keep old source code working. We strongly advise against using it in new code. See <a href="porting4.html#qsqlselectcursor">Porting to Qt 4</a> for more information.</p>
<p>Inherits <a href="q3sqlcursor.html">Q3SqlCursor</a>.</p>
<ul>
<li><a href="q3sqlselectcursor-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h3>Public Functions</h3>
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<li><div class="fn"/><b><a href="q3sqlselectcursor.html#Q3SqlSelectCursor">Q3SqlSelectCursor</a></b> ( const QString &amp; <i>query</i> = QString(), QSqlDatabase <i>db</i> = QSqlDatabase() )</li>
<li><div class="fn"/><b><a href="q3sqlselectcursor.html#Q3SqlSelectCursor-2">Q3SqlSelectCursor</a></b> ( const Q3SqlSelectCursor &amp; <i>other</i> )</li>
<li><div class="fn"/><b><a href="q3sqlselectcursor.html#dtor.Q3SqlSelectCursor">~Q3SqlSelectCursor</a></b> ()</li>
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<ul>
<li><div class="fn"/>43 public functions inherited from <a href="q3sqlcursor.html#public-functions">Q3SqlCursor</a></li>
<li><div class="fn"/>28 public functions inherited from <a href="qsqlrecord.html#public-functions">QSqlRecord</a></li>
<li><div class="fn"/>37 public functions inherited from <a href="qsqlquery.html#public-functions">QSqlQuery</a></li>
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<a name="protected-functions"></a>
<h3>Protected Functions</h3>
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<li><div class="fn"/>virtual int <b><a href="q3sqlselectcursor.html#update">update</a></b> ( const QString &amp; <i>filter</i>, bool <i>invalidate</i> = true )</li>
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<ul>
<li><div class="fn"/>7 protected functions inherited from <a href="q3sqlcursor.html#protected-functions">Q3SqlCursor</a></li>
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<a name="details"></a>
<hr />
<h2>Detailed Description</h2>
<p>The Q3SqlSelectCursor class provides browsing of general SQL SELECT statements.</p>
<p>Q3SqlSelectCursor is a convenience class that makes it possible to display result sets from general SQL <tt>SELECT</tt> statements in data-aware Qt widgets. Q3SqlSelectCursor is read-only and does not support <tt>INSERT</tt>, <tt>UPDATE</tt> or <tt>DELETE</tt> operations.</p>
<p>Pass the query in at construction time, or use the <a href="q3sqlcursor.html#exec">Q3SqlSelectCursor::exec</a>() function.</p>
<p>Example:</p>
<pre> ...
 Q3SqlSelectCursor* cur = new Q3SqlSelectCursor(&quot;SELECT id, firstname, lastname FROM author&quot;);
 Q3DataTable* table = new Q3DataTable(this);
 table-&gt;setSqlCursor(cur, true, true);
 table-&gt;refresh();
 ...
 cur-&gt;exec(&quot;SELECT * FROM books&quot;);
 table-&gt;refresh();
 ...</pre>
<hr />
<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="Q3SqlSelectCursor"></a>Q3SqlSelectCursor::Q3SqlSelectCursor ( const <a href="qstring.html">QString</a> &amp; <i>query</i> = QString(), <a href="qsqldatabase.html">QSqlDatabase</a> <i>db</i> = QSqlDatabase() )</h3>
<p>Constructs a read only cursor on database <i>db</i> using the query <i>query</i>.</p>
<h3 class="fn"><a name="Q3SqlSelectCursor-2"></a>Q3SqlSelectCursor::Q3SqlSelectCursor ( const Q3SqlSelectCursor &amp; <i>other</i> )</h3>
<p>Constructs a copy of <i>other</i></p>
<h3 class="fn"><a name="dtor.Q3SqlSelectCursor"></a>Q3SqlSelectCursor::~Q3SqlSelectCursor ()</h3>
<p>Destroys the object and frees any allocated resources</p>
<h3 class="fn"><a name="update"></a>int Q3SqlSelectCursor::update ( const <a href="qstring.html">QString</a> &amp; <i>filter</i>, bool <i>invalidate</i> = true )&nbsp;&nbsp;<tt> [virtual protected]</tt></h3>
<p>Updates the database with the current contents of the cursor edit buffer using the specified <i>filter</i>. Returns the number of records which were updated. For error information, use <a href="qsqlquery.html#lastError">lastError</a>().</p>
<p>Only records which meet the filter criteria are updated, otherwise all records in the table are updated.</p>
<p>If <i>invalidate</i> is true (the default), the cursor can no longer be navigated. A new select() call must be made before you can move to a valid record.</p>
<p>Reimplemented from <a href="q3sqlcursor.html#update-2">Q3SqlCursor</a>.</p>
<p>See also <a href="q3sqlcursor.html#update">Q3SqlCursor::update</a>(), <a href="q3sqlcursor.html#primeUpdate">primeUpdate</a>(), <a href="q3sqlcursor.html#setMode">setMode</a>(), and <a href="qsqlquery.html#lastError">lastError</a>().</p>
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